Tunable Periodically Ordered Mesoporosity in Palladium Membranes Enables Exceptional Enhancement of Intrinsic Electrocatalytic Activity for Formic Acid Oxidation

Ding, Jia; Zhi, Lin; Liu, Xiaorui; Liu, Bin; Liu, Jie; Deng, Yida; Han, Xiaopeng; Hu, Wenbin; Zhong, Cheng

doi:10.1002/anie.201914649

Cited by 45 publications

(34 citation statements)

References 58 publications

(65 reference statements)

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“…The peak current density of Pds-Mixed also stays on high levels compared to state-of-the-art Pd-based electrocatalysts in terms of catalytic current density toward FAO (from Figure 6d and Table S1). Moreover, the redox peak of Pds-Mixed at about 0.24 V (vs. SCE) is ascribed to the direct dehydrogenation reaction (Pd + HCOOH → Pd + CO 2 + 2H + + 2e − ) [44,45]. This reaction mechanism indicates less production of CO, leading to a higher energy conversion efficiency and less catalyst poisoning.…”

Section: Electrochemical Resultsmentioning

confidence: 97%

Palladium Particles Modified by Mixed-Frequency Square-Wave Potential Treatment to Enhance Electrocatalytic Performance for Formic Acid Oxidation

Liu

Shen

et al. 2021

Catalysts

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Palladium catalysts have attracted widespread attention as advanced electrocatalysts for the formic acid oxidation (FAO) due to their excellent electrocatalytic activity and relatively high abundance. At present, electrodeposition methods have been widely developed to prepare small-sized and highly-dispersed Pd electrocatalysts. However, the customary use of surfactants would introduce heterogeneous impurities, which requires complicated removal processes. In this work, we reported a two-step electrochemical method that employed square-wave potential treatment (SWPT) to modify electrodeposited Pd particles without the use of capping agents. Under the SWPT with a mixed frequency, Pd particles show significantly reduced size and more dispersed distribution, exhibiting a high mass activity of 1.43 A mg−1 toward FAO, which is 4.6 times higher than the counterpart of commercial Pd/C. The increase in electrocatalytic activity of FAO is attributed to the highly developed surface of palladium particles uniformly distributed over the support surface.

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Section: Electrochemical Resultsmentioning

confidence: 97%

Palladium Particles Modified by Mixed-Frequency Square-Wave Potential Treatment to Enhance Electrocatalytic Performance for Formic Acid Oxidation

Liu

Shen

et al. 2021

Catalysts

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“…Among them, electrodeposition is advantageous to create direct contact between the electrode and current collector with desired structures resulting in higher energy density by eliminating the need for electrochemically inactive materials and other additives. [60,79]…”

Section: Energy Densitymentioning

confidence: 99%

Flexible and Wearable Power Sources for Next‐Generation Wearable Electronics

Fan

Liu

Ding

et al. 2020

Batteries & Supercaps

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Personal electronic devices are moving toward an era in pursuit of wearability and versatility enabling a wide range of healthcare, entertainment and sports applications. Conventional power source with bulky and rigid structure becomes a bottleneck for the rapid advancements of wearable smart electronics. To meet the requirement of next-generation wearable electronics, power supplies with high flexibility, bendability, and stretchability have received extensive attention. In this review, requirements of flexible and wearable power sources in terms of the flexible battery configuration design, flexible materials, energy density and other request are highlighted. Several promising power supplies (e. g., metalÀ sulfur batteries, metalÀ air batteries, energy storage and conversion integrated devices) for the application of wearables are discussed in detail. Furthermore, discussions are presented on the remaining challenges and some possible research directions to establish a perspective for practical applications of power sources for wearable electronics in the near future.

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“…The environmental pollution and energy crises have led to great interest in the research and development of environmentally friendly and highly efficient devices that can alleviate these problems . Liquid fuel cells (LFCs) can convert the chemical energy of liquid fuel directly into electrical energy, and therefore, their efficiency is not limited by the Carnot cycle . Thus, LFCs are believed to be promising for realizing improved energy conversion efficiency .…”

Section: Introductionmentioning

confidence: 99%

Recent Achievements in Noble Metal Catalysts with Unique Nanostructures for Liquid Fuel Cells

Sun

2020

ChemSusChem

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In recent years, research efforts have been focused on the design and fabrication of highly efficient catalysts for liquid fuel cells, because the use of these cells is an important approach for alleviating environmental pollution and energy crises. However, the limitations of the catalytic performance of industrial Pt/C have strongly hindered the development of these fuel cells. The catalyst morphology has a strong impact on its performance; nanostructured catalysts are preferred as they offer large specific surface area and more exposed active centers. In view of this, many catalysts with unique structures have been synthesized in recent years, all of which show excellent catalytic performance characteristics. Despite these achievements, few efforts have been made to survey this field comprehensively. Herein, the recent advances in catalysts for liquid fuel cells are summarized, with a focus on noble metal catalysts with unique morphologies such as nanowires, nanosheets, and assembly structures. Their formation mechanisms are discussed critically. The relationship between the unique morphologies and excellent performance of these catalysts is also explored. This work may provide guidelines for the further development of liquid fuel cells.

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Tunable Periodically Ordered Mesoporosity in Palladium Membranes Enables Exceptional Enhancement of Intrinsic Electrocatalytic Activity for Formic Acid Oxidation

Cited by 45 publications

References 58 publications

Palladium Particles Modified by Mixed-Frequency Square-Wave Potential Treatment to Enhance Electrocatalytic Performance for Formic Acid Oxidation

Palladium Particles Modified by Mixed-Frequency Square-Wave Potential Treatment to Enhance Electrocatalytic Performance for Formic Acid Oxidation

Flexible and Wearable Power Sources for Next‐Generation Wearable Electronics

Recent Achievements in Noble Metal Catalysts with Unique Nanostructures for Liquid Fuel Cells

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